英文:
Add method to Struct Property of pointer type
问题
我有这个结构体：
type AppContext struct {
DB *db.DB
Properties *db.Col
}
Properties 是类型为 *db.Col 的 Tiedot 集合。
我的问题是，对于我的缓冲系统，我想能够获取集合的名称。奇怪的是，该库的默认部署无法做到这一点。
当我这样实例化 AppContext：
App = AppContext{}
然后执行：
App.DB.Create("Properties")
App.Properties = App.DB.Use("Properties")
我想添加一个实例方法，但它不允许我这样做：
func (dbCol App.Properties) ColName() string {
return "Properties"
}
你有什么办法可以实现这个，或者以更智能的方式扩展 Tiedot 吗？
英文:
I have this struct:
type AppContext struct {
DB *db.DB
Properties *db.Col
}
Properties of the Type *db.Col is a Tiedot Collection.
The problem I have is that for my buffering system I want to be able to fetch name of the collection. Weirdly enough the default deployment of the library can't do it.
When I instantiate the AppContext like so:
App = AppContext{}
..and then do:
App.DB.Create("Properties")
App.Properties = App.DB.Use("Properties")
I want to add an instance method, but it doesn't allow me to:
func (dbCol App.Properties) ColName() string {
return "Properties"
}
Any idea how I could accomplish this or maybe extend Tiedot in a smarter way?
答案1
得分: 1
我不认为在Go语言中可以实现这样的扩展。然而，我确信问题可以用其他方式解决。例如，你可以创建一个包含集合和其名称的结构体：
type Collection struct {
Col *tiedot.Col
Name string
}
然后进行初始化：
App.Properties = Collection{App.DB.Use("Properties"), "Properties"}
英文:
I do not think that such extension is possible in Go. However, I sure that the problem can be solved in some other way. For example, you can create structure that holds the collection and its name:
type Collection struct {
Col *tiedot.Col
Name string
}
and initialise it
App.Properties = Collection{App.DB.Use("Properties"), "Properties"}
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